Question

read gidgets blog. blog: gidget loves gadgets post guys, you know me, you know that there isnt a device that i can resist. new technology! yippee! bring it on. but when i heard that they are soon going to bring cell - phone service to the subway tunnels i gasped. (okay, maybe it wasnt a gasp, but it sure was a sigh!) are you really going to unleash at least twenty - five cell - phone calls in a crowded train at rush hour? why cant people just make their calls on the subway platform before they get on the train? this is one case where just because we can do it, does it really need to be done? what is the purpose of this blog? to instruct and teach readers to advertise local businesses or products to offer technical explanations to persuade readers toward the writers point of view

Explanation:

The blog post starts with the writer's enthusiasm for new technology but then expresses a negative reaction (gasp/sigh) to the idea of cell - phone service in subway tunnels. The writer poses rhetorical questions like "Why can't people just make their calls on the subway platform before they get on the train?" and "This is one case where just because we can do it, does it really need to be done?" These are attempts to persuade the readers to share the writer's view that cell - phone service in subway tunnels may not be a good idea. There is no teaching/instructing (no step - by - step knowledge transfer), no advertising (no mention of businesses/products for sale), and no technical explanations (no details about how cell - phone service works in tunnels).

Answer:

to persuade readers toward the writer's point of view